Tractor harrow hitch



Jan. 27, 1931.

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A. C. LINDGREN TRACTOR HARROW HITCH 2 Sheets-Sheet 1 Filed NOV. 7, 1927 v Jan. 27, 1931. v A. c. LINDGREN TRACTOR' H Annow HITcH Filed Nav.. v, lla? 'zfsneets-snm 2 mama Ja..-21,",'1931l l simple form oflaterally adjusta I y Igemtl UNITED- STATES/PATENT omer.;

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VISTEB COIPANY,'A COMORLTION Ol' NEW JERSEY mmc'ron mnow mon Application mcd November 7, Serial No. 281,405. A

This `invention relates to implement hitches and in particular to a laterally shiftable hitch for tractor-drawn implements. The object of the invention is to provide a le draft connection between an implement, such as a disk harrow, and 'a tractor that-will the implement to be drawn either directly behind the tractor or in lateral offset relation thereto; which will effectively retain the impleinent in either of said positions, andwhich will be capable of ready change from central to offset draft positions through novel and simple mechanism for altering the length of one of the members of the draft connection. Other objects and advantages will become apparent from the followin description of one specific .construction em odying the invention, thescope of which is defined in the follo claims.

Referring to the drawings,- Figure 1 is a lan connection of ,.t is invention l applied to a tractor disk barrow;

Fi re 2 is a similar plan view showing the raft connection in a different position of adjustment;

Figure 3 is a plan view showing the draft connect-ion with. one of its members in a position assumed by process of' adjustment;

Figure 4 is a detail view of a partof the draft connection on an enlarged scale and viewed on the line 1.-4' of Figure 2.; and

Fi ure 5 is a similar view on the line 5-5 of Figure 1 of the. draft member shown in Figure 4, with its ferent position.

For pur oses of illustration, the invention has been sown as applied to al tractor disk barrow of the two-gang type for which the draft connection to be described .is particularly well. adapted. The narrow comprises front andvrear oblong rectangular frames l0 and-11 in which are mounted disk gan s 12 and 13. The vframes are connected y a pivotal or rocking connection comprising freely movable cross members 14, respectively pivoted at 15 and 16 to oppositelylprc-l jecting aum'liary frames 17, 18 xed/on the rmit .to one end o view showing the draft its parts during the parts adjusted to a difb .Assioma -ro mrmn'rron'u. mm-

adjacent sides of the respectiveimplement frames.'

Suitable means is provi ed for effecting angular adjustment of the two frames, but, as neither said means nor the tractor. harrow structure .above described forms 'the subject-matter of the present invention, no further description is necessary1 as these form the subject-matter of assignee s co`- j nding application by W. C. Dwyer, 'Serial No. 231,433, filed November 7, 1927.

The draft connection embodyingv the present invention comprises a main draft member 19 which is the front transverse bar of the ,implement lframe 10. This connection is preferably made through a clevis-21 pivoted -to theframe on a horizontal axis at 22. .At

its Vforward end the draft member 19 carries bitching. means, such as a bar 23, which is adapted for connection to the draw-bar 24 of a tractor, the wheels of which are seen in fragment at 25. The draft connection also comprises a second draft member made up ofa plurality of'(in this instance 3) elongated iiat bars 26, 27 and 28. As best seen 1n Figure 4, these bars are disposed with their adjacent ends in superposed overlapped relation and with the central bar permanently pivotally connected, as at 29 and 30, to .the endsy ofthe other two bars. These points of pivotal connection on the central bar 27 are spaced. inwardly. from the ends of that bar, and the points of connection with the other two bars are atthe ends thereof. This structure permits the central bar to be `reversed on its pivots' 29 and 30 so as to cause the three ars to assume the positions shown in Figure pivoted on a vertical axis at 20 5, and, in order to permit the bars to be locked l in either of the two positions shown, the ends of bar27-are provided with in or lock bolt receiving openings at 3l, an corresponding openings 32 and 33 so spaced from the ends of bars 26 and 28 as to register with the openings 31, are formed in said members. Itfollows, therefore, that the articulated draft member made up of the sections 26, 27

and 28, can be adjusted by folding and unfolding the bar sections as above described so that 4its len h can be altered to thereby var the angle'- etween it and the main dra t 1w esl member 19. When the articulated sections are brought into either of their ad'usted positions, they may be locked in recti inear relation as by means of lock bolts 34 placed in the registered openings 31 and 32 or 31 and 33, according .to whether the bars are folded or unfolded. The articulated draft member just described has one end ,pivotall connected on a vertical axis to the imp ement frame at 35 through a clevis 36 similar to the clevis 2l, and its other or forward end is pivotally connected at 37 to the main draft member 19 through a pivot plate 38 secured to the member 19 intermediate its ends.

The construction above described provides a draft connection made up of two converging draft members, one of which is composed of' articulated sections so constructed as to be readily contractable and expansible without disconnection of parts or change in the construction other than the removal of lock bolts 34 and their reinsertion in the lock openings when the sectionsv are in adjusted position. As seen in Figure 3, removal of the lock bolts permits the sections of the draft member to swing on each other in the manner illustrated, and the main draft member 19 is, therefore, swung on its pivot 20 to bring Vthe hitching point either towards or away from the opposite end of the implement frame. When the articulated draft member is extended the proportion lof the arts is such that the bitching point will be o set sli htly to one side of the implement frame an the implement will, therefore, be trailed at one side of the path of the tractor. @n the other hand, when the articulated member is contracted, as in Figure l, the hitch point is brought inwardly and the implement will trail directly in the tractors path. It will beobvious that both folding and unfolding of the articulated member may be edected by forward or backward movement of the tractor after the lock bolts are removed and dead center relation of the linked sections is broken, asin Figure 3a lt will be obvious to those skilled in the art that the above disclosure exemplies a simple and novel form of draft connection particularly adaptable to orchard disk tractor harrows, and that the draft connection menacer frame by changing the angular relation `of said members comprising a pluralit of permanently articulated overla ped lin s forming one of said members, an means for locking said links in either extended or contracted ad]ustment.

2. A, hitchvcomprising angularly related draft members connected together at one point, one of said members comprising a plurality of overlapped permanently pivotally connected sections swin able over each other into dierent positions 1n which the sections are in rectilinear relation and in each of which positions di'erent lengths of the respective sections are in overlapped relation.

3. A hitch comprising angularly related members pivoted together at one point, one of said members comprising permanently articulated `sections including three cloni' gated hat bars disposed with ends in superposed overlapped relation and with the'centralbar reversibly .pivotally oined at points spaced inwardly from its en s to the ends of t e other two bars, the central bar and connected bars being each provided with lock bolt receiving openings which register in the espective reversed positions of the central ar. ln testimony whereot` l ax my signature.

. ALEXUS C. LINDGREN.

` `los specifically described is capable of certain modifications within the scope of the followi connection latera y with respect to the 

